154 lines
3.0 KiB
Go
154 lines
3.0 KiB
Go
package flag // import "go.unistack.org/micro-config-flag/v3"
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import (
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"context"
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"errors"
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"flag"
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"fmt"
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"reflect"
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"time"
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"go.unistack.org/micro/v3/config"
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rutil "go.unistack.org/micro/v3/util/reflect"
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)
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var (
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DefaultStructTag = "flag"
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ErrInvalidValue = errors.New("invalid value specified")
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DefaultSliceDelim = ","
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DefaultMapDelim = ","
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)
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/*
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var (
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timeTimeKind = reflect.TypeOf(time.Time{}).Kind()
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timeDurationKind = reflect.TypeOf(time.Duration(0)).Kind()
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)
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*/
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type flagConfig struct {
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opts config.Options
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}
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func (c *flagConfig) Options() config.Options {
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return c.opts
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}
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func (c *flagConfig) Init(opts ...config.Option) error {
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for _, o := range opts {
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o(&c.opts)
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}
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fields, err := rutil.StructFields(c.opts.Struct)
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if err != nil {
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return err
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}
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for _, sf := range fields {
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tf, ok := sf.Field.Tag.Lookup(c.opts.StructTag)
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if !ok {
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continue
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}
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fn, fd, fv := getFlagOpts(tf)
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rcheck := true
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if !sf.Value.IsValid() {
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continue
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}
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vi := sf.Value.Interface()
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if vi == nil {
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continue
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}
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if f := flag.Lookup(fn); f != nil {
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return nil
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}
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switch vi.(type) {
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case time.Duration:
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err = c.flagDuration(sf.Value, fn, fv, fd)
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rcheck = false
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case time.Time:
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err = c.flagTime(sf.Value, fn, fv, fd)
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rcheck = false
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}
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if err != nil {
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c.opts.Logger.Errorf(c.opts.Context, "flag init error: %v", err)
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if !c.opts.AllowFail {
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return err
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}
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return nil
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}
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if !rcheck {
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continue
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}
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if sf.Value.Kind() == reflect.Ptr {
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sf.Value = sf.Value.Elem()
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}
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switch sf.Value.Kind() {
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case reflect.String:
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err = c.flagString(sf.Value, fn, fv, fd)
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case reflect.Bool:
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err = c.flagBool(sf.Value, fn, fv, fd)
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case reflect.Int:
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err = c.flagInt(sf.Value, fn, fv, fd)
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case reflect.Int64:
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err = c.flagInt64(sf.Value, fn, fv, fd)
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case reflect.Float64:
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err = c.flagFloat64(sf.Value, fn, fv, fd)
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case reflect.Uint:
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err = c.flagUint(sf.Value, fn, fv, fd)
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case reflect.Uint64:
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err = c.flagUint64(sf.Value, fn, fv, fd)
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case reflect.Slice:
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err = c.flagSlice(sf.Value, fn, fv, fd)
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case reflect.Map:
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err = c.flagMap(sf.Value, fn, fv, fd)
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}
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if err != nil {
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c.opts.Logger.Errorf(c.opts.Context, "flag init error: %v", err)
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if !c.opts.AllowFail {
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return err
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}
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return nil
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}
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}
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return nil
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}
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func (c *flagConfig) Load(ctx context.Context, opts ...config.LoadOption) error {
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options := config.NewLoadOptions(opts...)
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_ = options
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// TODO: allow merge, append and so
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flag.Parse()
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return nil
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}
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func (c *flagConfig) Save(ctx context.Context, opts ...config.SaveOption) error {
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return nil
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}
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func (c *flagConfig) String() string {
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return "flag"
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}
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func (c *flagConfig) Name() string {
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return c.opts.Name
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}
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func (c *flagConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) {
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return nil, fmt.Errorf("not implemented")
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}
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func NewConfig(opts ...config.Option) config.Config {
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options := config.NewOptions(opts...)
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if len(options.StructTag) == 0 {
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options.StructTag = DefaultStructTag
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}
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return &flagConfig{opts: options}
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}
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